Question: When did the relationship between Alfonso VI of Leon and Castile and Zaida come to an end?
Paraphrase: On what date did Alfonso VI of Leon and Castile and Zaida relationship come to an end?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q235080 p:P26 ?s . ?s ps:P26 wd:Q2543811 . ?s pq:P582 ?value}